Vibraphone Showcased In Jason Marsalis' 'Ballet Class'

Each month, NPR Music asks public radio personalities at member stations across the country to tell us about a song they can't get enough of. David Greene introduces listeners to member station WWNO's Gwen Thompkins — she's NPR's former East Africa correspondent. Her choice for July's installment of "Heavy Rotation," is "Ballet Class" by the Jason Marsalis Vibes Quartet.